package com.lagou.edu.service.impl;

import com.lagou.edu.dao.AccountDao;
import com.lagou.edu.dao.impl.JdbcAccountDaoImpl;
import com.lagou.edu.factory.BeanFactory;
import com.lagou.edu.pojo.Account;
import com.lagou.edu.service.TransferService;
import com.lagou.edu.utils.TransactionManager;

/**
 * @author 应癫
 */
public class TransferServiceImpl implements TransferService {

    //private AccountDao accountDao = new JdbcAccountDaoImpl();

//    private AccountDao accountDao = (AccountDao) BeanFactory.getBean("accountDao");

    // 最佳状态
    private AccountDao accountDao;

    // 构造函数传值/set方法传值

    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }

    @Override
    public void transfer(String fromCardNo, String toCardNo, int money) throws Exception {
        // 所谓事务就是，开始，提交，回滚
        // 所以说通常我们都发放在try catch里面
        try {
            // 开启事务(关闭事务的自动提交)
//            TransactionManager.getInstance().beginTransaction();
            Account from = accountDao.queryAccountByCardNo(fromCardNo);
            Account to = accountDao.queryAccountByCardNo(toCardNo);

            from.setMoney(from.getMoney()-money);
            to.setMoney(to.getMoney()+money);

            accountDao.updateAccountByCardNo(to);
            int c = 1/0;
            accountDao.updateAccountByCardNo(from);
            // 提交事务
//            TransactionManager.getInstance().commit();
        } catch (Exception e) {
            e.printStackTrace();
            // 回滚事务
//            TransactionManager.getInstance().rollback();
            // 抛出异常便于上层servlet捕获 (不然TransferServlet会执行200)
            throw e;
        }
    }
}
